Depending on the processed material from each drill must be properly sharpened. To verify the correct angle will help a specially prepared square plate of copper or aluminium with a thickness of 1 mm.
To become operational protractor enough to cut it cut, as shown in the picture: a large cutout at an angle of 120 degrees, the other half is 60 degrees and the surviving corner of a square is 90.
Recommend to read
BY “DIMLY”
As a rule, in all our homes — three-wire system on the chandeliers, combined with the series switches, providing three options of illumination. For patipanno chandeliers — two, three and...
FIGHTING GIRLFRIEND “WINGED INFANTRY”
The Creator of light tanks. After the victorious conclusion of the great Patriotic war of the Soviet airborne connection in June 1946 he was separated from the air force and became an...
